Find all the software update news regarding the Galaxy S8+ on this update timeline page of ours. You'll find up-to-date news regarding Android 10 readability for the Galaxy S8 and S8+ here, as well as an "update table" for each major carrier in the US (T-Mobile, Verizon, AT&T, and Sprint) and the international variant, which should highlight the newest available updates, with their changelog.
Android 10 One UI 2.0 Update Status! Galaxy S10, Note 10, Note 9, S9, S8, Note 8 & More!
The S8 Plus is now 2+ years old, which means it has already received two OS updates in Android Pie and Android Nougat. That means the S8 Plus (and S8) are not eligible for the next major update, it is not eligible for the next major OS update, Android 10.
However, monthly security patch updates are still being released regularly.
Well. On Android you can install a custom ROM. If a custom ROM based on Android 10 is made specifically for Galaxy S8 sets, you can install it and get Android 10 unofficially.
